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2.33-1.4 million years old, there cranial capacity is slightly less than half that of a modern human and they were the first to use crude stone tools
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They are 1.8-1.3 million years old, and was originally proposed as a separate species, Homo ergaster is now mostly considered either an early form, or an African variety, of Homo erectus.
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1.8 million - 300,000 years old and used stone tools for cutting and chopping
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600-400,000 years old and used stone tools similar to Homo Erectus. Was the first species to build shelter building simple dwellings out of sticks and rocks
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Existed between 600 - 350,000 years ago and there is evidence of populations having existed until 24,000 years ago. Thought to have interbred with another contemporary species.
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Modernity about 200,000 years ago, behavioural modernity about 100 - 50,000 years ago
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(2018, December 13) Homo heidelbergensis. Retrieved from http://humanorigins.si.edu/evidence/human-fossils/species/homo-heidelbergensis
